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Can't find interface-file decl with Typeable
The attached code produces the following error:
GHC error in desugarer lookup in Main:
Can't find interface-file declaration for variable $tc'(,)
Probable cause: bug in .hi-boot file, or inconsistent .hi file
Use -ddump-if-trace to get an idea of which file caused the error
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.1 for x86_64-unknown-linux):
initDs IOEnv failure
when I run stack bench lol. The issue seems to be related to Typeable instances for types created with singletons.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |